Not exactly what you asked, but I I took some photos for you of the rack when the bags are removed (note, these are mounted on a Hepco Bekker rack, but it works the same on most any rack). The last photo shows how the bags are locked to the racks. (the black tape on the lock is just to stop the lock rattling).Looks good I was thinking the same with 25L Mosko Bags.
Is your SW Motech rack the quick release model ? If so how does it look with the rack removed ?